if (counter != curCount) return;

          display.scroller.scrollTop += outside;

          extend(e);

        }), 50);

      }

    }

    function done(e) {

      counter = Infinity;

      e_preventDefault(e);

      focusInput(cm);

      off(document, "mousemove", move);

      off(document, "mouseup", up);

      doc.history.lastSelOrigin = null;

    }

    var move = operation(cm, function(e) {

      if (!e_button(e)) done(e);

      else extend(e);

    });

    var up = operation(cm, done);

    on(document, "mousemove", move);

    on(document, "mouseup", up);

  }

  var touchDrag;

  function onTouchMove(e) {

    if (!e.touches || e.touches.length !== 1 || e.touches[0].radiusX>1 || e.touches[0].radiusY>1) return;

    var cm = this;

    if (touchDrag) {

      var cur = posFromMouse(cm, e);

      e_preventDefault(e);

      extendSelection(cm.doc, clipPos(cm.doc, touchDrag), cur);

      return;

    }

    touchDrag = posFromMouse(cm, e);

    if (!touchDrag) return;

    var cm = this;

    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))

      return;

    function done(e) {

      touchDrag = null;

      e_preventDefault(e);

      focusInput(cm);

      off(document, "touchend", up);

    }

    e_preventDefault(e);

    var up = operation(cm, done);

    on(document, "touchend", up);

  }

  // Determines whether an event happened in the gutter, and fires the

  // handlers for the corresponding event.

  function gutterEvent(cm, e, type, prevent, signalfn) {

    try { var mX = e.clientX, mY = e.clientY; }

    catch(e) { return false; }

    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;

    if (prevent) e_preventDefault(e);

    var display = cm.display;

    var lineBox = display.lineDiv.getBoundingClientRect();

    if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);

    mY -= lineBox.top - display.viewOffset;

    for (var i = 0; i < cm.options.gutters.length; ++i) {

      var g = display.gutters.childNodes[i];

      if (g && g.getBoundingClientRect().right >= mX) {

        var line = lineAtHeight(cm.doc, mY);

        var gutter = cm.options.gutters[i];

        signalfn(cm, type, cm, line, gutter, e);

        return e_defaultPrevented(e);

      }

    }

  }

  function clickInGutter(cm, e) {

    return gutterEvent(cm, e, "gutterClick", true, signalLater);

  }

  // Kludge to work around strange IE behavior where it'll sometimes

  // re-fire a series of drag-related events right after the drop (#1551)

  var lastDrop = 0;

  function onDrop(e) {

    var cm = this;

    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))